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Django 3 : Install2019/12/13
 
Install Django which is Python Web Application Framework.
[1] Install some packages.
[root@dlp ~]#
dnf -y install python3-virtualenv
[2] Install Django under an Virtualenv environment. It's possible to do for any common user.
[cent@dlp ~]$
virtualenv venv

[cent@dlp ~]$
cd ~/venv

[cent@dlp venv]$
source bin/activate

(venv) [cent@dlp venv]$
pip install django==3.0 

.....
.....
Installing collected packages: pytz, sqlparse, asgiref, django
Successfully installed asgiref-3.2.3 django-3.0 pytz-2019.3 sqlparse-0.3.0
(venv) [cent@dlp venv]$
django-admin --version

3.0
# exit from virtualenv

(venv) [cent@dlp venv]$
deactivate

[cent@dlp venv]$
[3] Create a test project.
If Firewalld is running and also access to Django from other Hosts, Allow ports you plan to use with root privilege before it. (example below uses [8000/tcp])
[cent@dlp ~]$
cd ~/venv

[cent@dlp venv]$
source bin/activate
# create testproject

(venv) [cent@dlp venv]$
django-admin startproject testproject

(venv) [cent@dlp venv]$
cd testproject

# configure database (default is SQLite)

(venv) [cent@dlp testproject]$
python manage.py migrate
# create admin user

(venv) [cent@dlp testproject]$
python manage.py createsuperuser

Username (leave blank to use 'cent'):
cent

Email address:
cent@dlp.srv.world

Password:
Password (again):
Superuser created successfully.
(venv) [cent@dlp testproject]$
vi testproject/settings.py
# line 28: set if you allow to access to Django from other Hosts

# specify Hosts with comma separated

# if allow all, specify like follows

ALLOWED_HOSTS = [
'*'
]
# start server

(venv) [cent@dlp testproject]$
python manage.py runserver 0.0.0.0:8000 

Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
December 13, 2019 - 03:49:56
Django version 3.0, using settings 'testproject.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.
[4] Access to the [http://(server's hostname or IP address):8000/] from a client computer. It's OK if following site is displayed normally.
[5] It's possible to use admin site on [http://(server's hostname or IP address):8000/admin].
[6] Create a test application to try to use Django.
[cent@dlp ~]$
cd ~/venv

[cent@dlp venv]$
source bin/activate

(venv)[cent@dlp venv]$
cd testproject

(venv)[cent@dlp testproject]$
python manage.py startapp test_app

(venv)[cent@dlp testproject]$
vi test_app/views.py
# add to the end

from django.http import HttpResponse
def main(request):
    html = '<html>\n' \
           '<body>\n' \
           '<div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">\n' \
           'Django Test Page\n' \
           '</div>\n' \
           '</body>\n' \
           '</html>\n'
    return HttpResponse(html)
(venv)[cent@dlp testproject]$
vi testproject/urls.py
# line 16: add like follows

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('test_app/', include('test_app.urls')),
]
(venv)[cent@dlp testproject]$
vi test_app/urls.py
# create new

from django.urls import path
from .views import main

urlpatterns = [
    path('', main, name='home')
]
(venv)[cent@dlp testproject]$
vi testproject/settings.py
# line 33: add test application in [INSTALLED_APPS] section

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'test_app',
)
(venv)[cent@dlp testproject]$
python manage.py runserver 0.0.0.0:8000

[7] Access to the [http://(server's hostname or IP address):8000/testapp/] from a client computer. It's OK if testapp is displayed normally.
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